In an e-mail explaining the Connecticut district’s decision, superintendent Janet Robinson assured parents that a temporary site at Chalk Hill Middle School in nearby Monroe would be safe —but that it was too soon to resume classes just yet.

“We plan to open school in January in that building, but in the meantime, we need to tend to our teachers’ and students’ needs to feel comfortable after this trauma in this new place,” she wrote.

Robinson said teachers would invite parents to visit the new site with their children sometime this week, and encouraged them to take the opportunity to show their kids around their new “home.”

“For some children, it will be simply to re-enter a school and know that they are safe,” she wrote.

“Please take advantage of this offer to reunite with their teacher[s].”

Robinson also assured parents there would be a police presence “both outside and inside the school” when classes resume.

One mom of a Sandy Hook preschooler said that she’s confident her daughter will be safe — but that it won’t make it any easier to drop her off.

“I feel like it’s going to be hard to let her go back,” Jennifer Strychalski said of daughter Emma.

“[But] now I feel secure. I think it’s the heightened sense of everybody. I hear there’s lots of security at the schools.”

The already challenging return to classes for kids elsewhere in the Newtown district was marred by a threat to one nearby elementary school yesterday.

Cops shuttered Head O’Meadow Elementary School — less than five miles from Sandy Hook Elementary — after Head O’Meadow received the unspecified threat.

Board of Education officials said there were both marked and unmarked police vehicles at every school in the district.

Mom Michelle O’Donnell — whose two daughters attend St. Rose of Lima near Sandy Hook Elementary — said she was torn about the beefed-up police presence.

“It’s tough,” O’Donnell said. “Part of me would feel better to have more security, but another part of me thinks it’ll add more fear for [the kids].”